F-threshold functions: syzygy gap fractals and the two-variable homogeneous case

In this article we study F-pure thresholds (and, more generally, F-thresholds) of homogeneous polynomials in two variables over a field of characteristic p>0. Passing to a field extension, we factor such a polynomial into a product of powers of pairwise prime linear forms, and to this collection of linear forms we associate a special type of function called a syzygy gap fractal. We use this syzygy gap fractal to study, at once, the collection of all F-pure thresholds of all polynomials constructed with the same fixed linear forms. This allows us to describe the structure of the denominator of such an F-pure threshold, showing in particular that whenever the F-pure threshold differs from its expected value its denominator is a multiple of p. This answers a question of Schwede in the two-variable homogeneous case. In addition, our methods give an algorithm to compute F-pure thresholds of homogenous polynomials in two variables.Comment: 42 pages; 6 figures. Section 6 was mostly rewritten; a new appendix was included; other smaller changes throughout. Comments welcom

The lender of last resort in the european single financial market

The paper examines challenges in effectively implementing the lender-of-last-resort function in the EU single financial market. Briefly highlighted are features of the EU financial landscape that could increase EU systemic financial risk. Briefly described are the complexities of the EU’s financial-stability architecture for preventing and resolving financial problems, including lender-of-last-resort operations. The paper examines how the lender-of-last-resort function might materialize during a systemic financial disturbance affecting more than one EU Member State. The paper identifies challenges and possible ways of enhancing the effectiveness of the existing architecture

Método das curvas de equilíbrio no planeamento da construção repetitiva em altura

A abordagem do planeamento da construção repetitiva iniciou-se com os métodos tradicionais de programação. Porém, dadas as suas limitações no tratamento do problema desenvolveram-se métodos específicos para este tipo de construção, e mais recentemente introduziu-se o conceito de aprendizagem. Neste trabalho apresenta-se um novo método de programação dos trabalhos repetitivos, dotado dos atributos das metodologias tradicionais e das vantagens que resultam da utilização de métodos específicos na programação daquele tipo de trabalhos e que inclui a consideração do efeito da aprendizagem

Reasons for the lack of competitiveness of the portuguese construction industry

The last few years have confirmed what was mostly feared: Portuguese construction industry suffers from a chronic disease - the lack of competitiveness. Symptoms have long been recognised in several construction projects: frequent delays, cost overruns, deficient safety, absent quality. The authors have been carrying out several studies whose aiming at are clarify reasons for the lack of competitiveness of national construction industry on the four items mentioned above. This paper occurs mainly about the aims of PhD` survey about construction delays. It has the following mains components: (1) to research and analysis bibliography and establish a common set of causes and background reasons for the problem; (2) to inquire to Portuguese construction stakeholders on the causes and background reasons for project delays following from their experience in recent projects; (3) to establish possible paths to solve the problem. The survey results appear to confirm the original list of causes for delays of the study. The mains reasons are related with designer problems, poor productivity, procurement system, overly optimistic planning, and frequent change orders during construction and so on. Thereafter, the paper will seek what could possibly be done and from which parties, in order to correct the above problems and improve construction competitiveness. The most highly ranked on a scale of relevance by stakeholders were implementation a national database with the quantity works list for different construction projects, a more appropriate and efficient organizational systems within design teams and a need for greater care on the part of the owners when they prepare their schedules and preliminary programmes.Science and Technology Foundation, in Portuguese - Project SAPIENS Nº 4762 "Reasons for the lack of accomplishment of schedule, costs and safety objectives in construction".LEONARDO DA VINCI - Community Vocational Training Action Programme Second, Phase 2000-2006 - Project PL/04/B/P/PP/-174 417 "Recognition of needs and creation of professional training in the area of preparation and management of infrastructure construction projects financed by the European Union"

As consequências do incumprimento dos prazos para a competitividade da indústria de construção : razões para os atrasos

Este artigo pretende divulgar o estudo que tem decorrido na Universidade do Minho sobre a problemática dos incumprimentos dos prazos de construção. Numa primeira fase centrou-se na identificação das causas dos atrasos dos projectos de construção, nos métodos da sua resolução e aspectos afins, numa segunda fase procedeu-se à elaboração e implementação de um inquérito às partes envolvidas nas actividades de construção

Using linear model for learning curve effect on highrise floor construction

The evolution of repetitive scheduling methods led to the introduction of the learning concept in construction planning. It is common knowledge that performing the same activity repeatedly, and in the same conditions, takes less and less time as the activity is repeated (Gates and Scarpa, 1972). This phenomenon is clear in many construction activities and is known as learning experience or learning effect. The increase in productivity is mainly due to the increasing knowledge acquired by work repetition. Graphic representation is through a learning curve that admits duration decreases as the activity is repeated, according to a predictable and constant learning rate. The Linear Model of logarithmic coordinates (log10Y 5 log10A – nlog10X) was applied to two repetitive construction processes, frequently used in Portuguese construction. The intent was to examine its applicability and efficiency in predicting future performances, and the interest in incorporating the model in new planning methodologies for repetitive construction. In both cases, learning processes were created

Effect of the Injection moulding processing conditions on biopolymers final properties

This research work intended to study the effect of the main injection moulding parameters in the final properties of biopolymers mouldings. An experimental procedure was carried out in which four biopolymers containing different composition percentages of poly-lactic acid (PLA) and plasticized starch (PLS) were compared with polypropylene (PP). For each material the effect of the processing conditions (mould temperature, injection temperature and holding pressure) on the final properties was discussed and the possibility of using biopolymers as a substitute of PP in household utility products was evaluated

Modelos de aprendizagem na construção

A importância da consideração do efeito de aprendizagem no planeamento das actividades produtivas industriais tem sido objecto de investigação abundante. Recentemente, com o reconhecimento das vantagens da consideração do fenómeno, a investigação estendeuse também ao sector da construção. No entanto, são conhecidas dificuldades de aplicação do produto dessa análise em especial no tocante ao modelo matemático a adoptar para a curva de aprendizagem. Neste trabalho, faz-se uma descrição dos modelos matemáticos mais utilizados para a modelação da aprendizagem e é apresentado um estudo que aponta para uma melhor correlação do modelo cúbico (logx, y) com a informação conhecida e para uma melhor previsão do modelo linear (logx, logy) de desempenhos futuros

Intrapatient variability of the pupillary pain index to remifentanil

info:eu-repo/semantics/publishedVersio